Ribbon-bow forming apparatus



May 3, 1966 B. w. BocK ETAL RIBBONBOW FORMING APPARATUS 3 Sheets-Sheet 1 Filed Oct. 14, 1964 INVENTOR5 55H- soc/r BY Amer/1v GOLOMBEK May 3, 1966 B. w. BOCK ETAL RIBBON-BOW FORMING APPARATUS 3 Sheets-Sheet 2 Filed Oct. 14, 1964 May 3, 1966 B. w. BOCK ETAL RIBBON-BOW FORMING APPARATUS Filed Oct. 14, 1964 3 Sheets-Sheet 3 INVENTORS 55/?! W- SOC/f MART/N Gad/WEEK 3,249,269 RIBBON-BOW FORMING APPARATUS Bert W. Bock, 53 Sanford Road, Fair Lawn, N.J., and

Martin Golomhek, 187 Clinton St., Hackensack, NJ. Filed Oct. 14, 1964, Ser. No. 403,951 11 Claims. (Cl. 223-46) are currently in vogue for the decoration of gift packages,

particularly adapted for both manual and automatic operation.

Manually operated apparatus for making multiple-loop ribbon bows, of the character described, has heretofore been known and used; an example is the apparatus disclosed in US. Patent No. 2,933,223. And it is the general object of the present invention to provide apparatus, of the character described, that possesses improved characteristics and advantages over the prior art apparatus as in the following respects.

It is an object of the present invention to provide apparatus of the character described which may accept and efiiciently operate with ribbons of various types and characteristics; including certain types of ribbons that have been found unsuitable for use with the apparatus of the prior art.

It is another object of the present invention to provide apparatus, of the character described, having improved means for rotating the ribbon impaling member of the apparatus through full 360, to thereby make possible the formation of a complete center loop on a ribbon bow.

'It is also an object of the present invention to provide apparatus, of the character described, having improved and more flexibly adjustable means for moving a ribbon into impaling position at a more finely adjustable predetermined angle to a preceding loop to thereby readily, easily and accurately vary the number of loops which a star bow may be formed.

It is still another object of the present invention to provide apparatus, of the character described, having readily-adjustable means for accurately predetermining the length of the loops and, consequently, the diameter of the ribbon bows formed on the apparatus.

It is yet another object of the present invention to provide apparatus, of the character described, having improved means for more easily and conveniently threading and guiding the loop-forming ribbon to the ribbon-impaling means of the apparatus.

It is afurther object of the present invention to provide means inhibiting the sagging of the ribbon on its path to the impaling means, to thereby prevent missed loops in the formation of the bow. It is still a further object of the present invention to provide apparatus, of the character described, having ribbon-impaling means whose impaling pins may be readily replaced when damaged or broken.

It is yet a further object of the present invention to provide apparatus, of the character described, which is of relatively simple and compact construction and easilyhandled for moving or transporting from place to place; which is strong and sturdy and will require a minimum of maintenance and care; and which is easily and convenient to operate.

The foregoing and other objects and advantages of the apparatus of the present invention will become more readily apparent to those skilled in the art from the embodiment thereof shown in the accompanying drawings and from the description following. It is to be understood, however, that such embodiment is shown by way of illustration only, to make the principles and practice of the invention more comprehensible, and without United States Patent 0 3,249,269 Patented May 3, 1966 ice any intent of limiting the invention to the specific details therein shown.

In the drawings:

FIG. 1 is a top plan view of one embodiment of the apparatus of the present invention;

FIG. 2 is a side elevational and partly sectional view, of the apparatus, with the ribbon-moving carriage in retracted position;

FIG. 3 is a vertical, sectional view, on an enlarged scale, through the apparatus, showing the ribbon-moving carriage in ribbon-moving position but short of impaling the ribbon;

FIG. 4 is a bottom plan view of the apparatus;

FIG. 5 is a fragmentary view of the apparatus after impaling of the ribbon and in partly retracted position;

FIG. 6 is a sectional view taken on line 6-6 of FIG. 3;

FIG. 7 is a sectional view taken on line 7-7 of FIG. 2;

FIG. 8 is a sectional view taken on line 8-8 of FIG. 1;

FIG. 9 is an exploded view of the impaling post of the invention; and

FIG. 10 is an isometric view of the apparatus of the invention shown as enclosed in a casing.

Referring now in greater detail to the embodiment of the invention illustrated in the drawings, the same is shown to comprise a base, including an elongated table 10, held in elevated relation to a supporting surface by depending side walls 11, which may be formed with offset ends 12, that may preferably face one another. At one end of the table 10 there is rotatably supported, in upright position, an impaling post structure, generally designated as 14, including a plurality of upwardly projecting impaling pins 15. Mounted on the table 10, along its longitudinal edge remote from the operator, is an upright wall 16, which may be secured to the table by its laterally offset edge 17. The wall 16 supports, as by the plate 18, in diagonally, rearwardly, upwardly extending position, a rod 19, having an offset end 20, on which may be rotatably supported a spool 21, for a continuous roll of ribbon 22.

Mounted on table 10 intermediate posts 14 and His a structure for advancing ribbon from the spool 21 toward impaling pins 15. Such structure may comprise a ribbonadvancing carriage mounted on the table 10 for reciprocable movement thereon. Such carriage may consist of a preferably rectangular plate 23, having a dependent stud 24, at approximately each corner thereof, which studs extend into an opening 25, having parallel longitudinal edges, formed in the table 10. Each stud 24 is disposed adjacent one of the longitudinal edges of the opening 25 and carries a hearing which is provided with an upper flange 26, engaging over the top surface of the marginal edge portion of the adjacent longitudinal edge of the opening 25, and a bottom flange 27, engaging under such marginal edge portion, to thereby retain the carriage in reciprocable position on the table 10. Preferably, such bearings and flanges may be formed of a material exerting a minimum of friction, as nylon, or the like.

The carriage plate 23 may carry means for engaging and advancing a ribbon uni-directionally from the spool 21 toward the impaling pins 15. Such means may come prise a U-shaped bracket 28, secured by one side to the plate 23 with its connecting side or web 29, facing the impaling post 14. The other side of the bracket 28 supports a channel-shaped ribbon guideway 30, of rectangular cross-section whose side walls may support between them at their forward end, a pin 31, on which is rotatably eccentrically, supported a relatively thick, heavy roller 32, in position to have its thicker portion extend forwardly of the pin 31, in the direction of the impaling post 14, and rest on the bottom of the channel guideway 30. The roller 32 may be provided with spaced friction ring 33,

3 intermediate its end, which may be formed of rubber or the like.

It will be readily seen that the roller 32 will slide over a ribbon impaled on pin to permit the rearward movement of the carriage without disturbing such ribbon; but

will frictionally engage such ribbon upon forward moveof the carriage plate 23, to which is pivotally connected,.

as at 37, one end of a horizontally disposed link 38, whose other end is pivotally connected, as at 39, to one end of a lever 40, that is pivotally supported in horizontal position, intermediate its ends, as at 41, on a post 42, mounted on table 10 adjacent its rear edge; with the free end of the lever 40 over-hanging the near edge of the table It adjacent the rear edge thereof and preferably provided with a knob 43.

Means are provided on the apparatus for guiding a ribbon 22 advanced by the carriage to impaling position. Such means comprises a ribbon guide, generally designated as 45, hingedly secured by one end; to one wing of a hinge 46,- whose other wing is secured to the forward face of the upright side 29 of the bracket 28 of the carriage plate 23. The ribbon guide may comprise a bottom plate 47, which is secured to the hinge 46, and may be of double ply of sheet material, as sheet metal, and a top plate 48, coextensive in size with bottom plate 47 and preferably hinged to the latter by its far longitudinal edge. The top plate-48 may be provided with spaced elements 49, along its longitudinal edges which define between them the ribbon guideway 50. Preferably the spacing elements 49 may be integral with the top plate and comprise inwardly turned marginal edge por-' tions of the top plate 48.

It will be clear that a ribbon may be readily and easily disposed in the guideway 50 by the lifting of the top plate 48, placing the ribbon on the plate 47 and lowering the plate 48. It will also be clear that the ribbon will move freely and easily through the guideway 50, without buckling or twisting.

The plates 47 and 48 of ribbon guide 45 are provided with inwardly extending recesses 51, in their lead edges to permit the lead end of the ribbon guide to straddle the impaling post 14 and impaling pins 15, when in forwardmost position, to impale the portion of the ribbon disposed within the recess 51 upon the impaling pins 15. Means may be provided for adjusting the Width of the guideway to the width of the ribbon passing therethrough to further confine the ribbon and limit its path. Such means may comprise one or more as two spaced transverse slots 53, formed in plate 48, in each of which a pair of pins 54, may be slidably disposed, each having an enlarged inner extension 55, adapted to form a limiting surface for the ribbon moving through the guideway, and a manipulating head 56, on the exterior.

The plates 47 and 48 may be provided with cooperating means for releasably interlocking them in contacting position, such as the detent pin 57, projecting from the underside of plate 48,-the registering opening in plate 47, and the detent snap element 58, on the other side of plate 47 around such opening engageable over the pin 57.

Means are provided for supporting the free end of the ribbon guide 45 in its reciprocal movement towards and away from the impaling'post 14 and to raise its forward end above post 14 and impaling pins 15, as it approaches the latter, and for dropping such forward end of the ribbon guide on to the impaling post 14 with pins 15 extending into the recess 51, as the ribbon guide 45 reaches its extrerne forward position. Such means may comprise an angle bar 60, secured to the rear wall 16 in elevated relation to the table 10 with its horizontal leg 61, overlying the table 1! A cam or ramp bar 62, is pivoted on the upright side of the angle bar 60 by one end, as at 63, in elevated relation to the leg 61 of the angle bar. The rear portion of the cam bar 62, tapers towards its rear end. The ribbon guide 45 has secured to its underside a pin 64, on which is mounted a roller 65, in position to ride up on the cam 62 as the ribbon guide- 45 is advanced. The roller 65 reaches the forward end of the cam bar 62 as the forward end of the ribbon guide reaches the forwardmost position and is disposed with its recess 51 overlying the impaling post 14. When the ribbon guide .45 reaches its forwardmost position, the roller 65 overrides the cam bar 62 and drops down to the leg 61 of the angle bar 60, thereby forcing the section of the ribbon 22 disposed in recess 51 on to the impaling pins 15. Cu the retracting movement of the carriage, and ribbon guide 45 the roller 65 will ride on the leg 61 of the angle bar 60 and will readily pass under the inner end of the cam 62. In order to cushion the fall of the forward end of the ribbon guide 45 at its forwardmost position, the forward end of the, leg 61 of the angle bar 60 may be severed from the upright leg thereof, as at 66 to form a resilientsupport for the drop ping roller 65.

The apparatus of the invention may be provided with lug or post 67, preferably struckout from the table Iii;

on which is mounted, by one end, a relatively soft coil spring 68, the upper end of which reaches substantially the height of the impaling pins 15 and hold the rounded head 69. It will be clear that the head 69 will support the ribbon section disposed between the. impaling pins 15 and the forwardmost ends of the retracted ribbon guide 45. It will also be apparent that the forward movement of the ribbon guide'45 will not be impeded by such spring 68, as the latter will be readily bent by the forward edge of the ribbon guide in its advance towards the impaling post and will not interfere with such advance (FIG. 5). It may here be stated that the lug 67 may serve as a stop for the forward movement of the carriage for which purpose the forward edge of the plate 23 of the carriage may be provided with a resilient buffer element 70.

Means are provided. on the apparatus for adjustably limiting the length of the carriage stroke, thereby controlling the length of the ribbonrolled from the spool 21 on each forward stroke of the carriage, and thus regulating the, size of the ribbon loops formed and the diameter of the resulting ribbon bow. Such stroke limiting means may comprise an internally threaded sleeve 72, mounted -on the table 10 at its rear end, with its axis extending longitudinally of the table, and a threaded rod '73,

adjustably, rotatably held within the sleeve 72,'with its forward end projecting from the sleeve 72, provided with a head 74, that may be engaged against the rear end of the ribbon carriage, as by a resilient buffer strip 75,'which may be secured to the rear face of the upright post 36, mounted on the plate 23. It will be readily apparent that the forwardly projecting end of the threaded rod 73 may be lengthenedor shortened by the turning of the rod to limit the rearward strokeof the carriage to make it shorter or longer'as desired.

Means are also provided on the apparatus for rotating the impaling post 14, uni-directionally and adjustably, a predetermined angular distance upon each forward stroke of the carriage, without moving the pin on the rearward stroke of the carriage. To that end, the impaling post 14 may be formed with a cylindrical core 77, which is journaled for rotation intermediate its end on table 10, in any desired manner, with one end thereof projecting below the table 10 and carrying the pulley wheel 78, which is operatively connected, as by the belt 79, to an idle pulley wheel 80, rotatably supported on the underside of the table 10, at its rear end. The pulley wheel 78 is supported on the core 77 for unidirectional rotation by means of an interposed one-way clutch or ratchet and pawl, in a manner well known to any skilled mechanic and not thought necessary to be specifically illustrated.

In order to rotate the impaling post 14 upon movement of the carriage to ribbon impaling position, the ribbon carriage plate 23, may be provided at its forward end with a dependent post 81, that projects through the guide slot 25 closest to the operating side of the machine and carries on its projecting end a pawl 82, to engage resiliently against the adjacent section of the belt 79. A backing plate 83, may be dependently supported from the carriage 23 in parallel relation and close proximity to the section of the belt 79 engageable by the pawl so as to support said belt section resistently against the pressure of the pawl that engages against it. In the embodiment of the invention illustrated in the drawings, the pawl is in the form of a disc, preferably having a roughened peripheral surface which is mounted eccentrically on the projecting end of the pin 81 with its largest section facing in the direction of the impaling post 14.

The disc pawl 82 is tensed against the belt 79 which may be likewise formed with a roughened surface for improved frictional engagement by the disc, by means of a spring 82a, one end of which is secured to the underside of the pawl 82 at its forward end, and the other end of which is anchored on the underside of the table'10, as to a pin dependent therefrom in position to pull the pawl against the belt 79. It may be here stated that instead of the pulley wheels 78 and 80 and the disc pawl 82, sprocket wheels and a sprocket chain may be used with a conventional type of pawl that engages within the links of the sprocket chain, may be used for the same purpose.

It will be clear that, as the ribbon carriage is moved forwardly toward the impaling post 14, the disc pawl 82 will grip firmly against the belt 79 to move it along with the ribbon carriage and thereby rotate the impaling post 14, and that on the return movement of the carriage and the pawl, the impaling post will not turn due to its unidirectional rotational mounting and the belt 79 will readily slip between the pawl 82 and backing plate 83 to permit the carriage to be rearwardly moved with facility.

Means may be provided for adjustably limiting the rotation of the impaling post 14 upon the forward movement of the ribbon carriage. Such means may be in the form of mechanism that will vary the distance between the point of initial contact between pawl and belt from the impaling post 14 on the forward movement of the carriage. This may be effected by masking a variable portion of the belt 79 against contact with the pawl 0n the forward movement of the latter, as by means of a masking plate supported in slidably adjustable position closely adjacent to the outer surface of the belt 79 and movable along such surface to inhibit contact between the pawl 82 and the belt 79 during an initial portion of the forward movement of the carriage.

In the illustrated embodiment of the invention, the belt masking means comprise a channel member, generally designated as 84, having spaced sides 85 and 87, one of which, as 87, is formed with a laterally and outwardly olfset flange 86, which is provided with spaced longitudinally aligned slots 88, by which the channel member-84 is slidably supported on the underside of table by the spaced headed pins 89, projecting from the underside of table 10, Whose heads engage the marginal edge portions of the slots 88. The channel member 84 is so formed and arranged that its other side 85, is disposed closely adjacent and parallel to the belt 79, with the pawl 82 receivable between sides 85 and 87, so that side '85 is interposable between the cam pawl 82 and the belt 79, to mask the belt against contact by the pawl.

The channel member side 87 may be formed with a struckout lug 90, which is ofiset in the direction of the near edge of the table to extend transversely thereof. The leg 90 is provided with an opening through which one end of a threaded rod 91, may be slidably inserted and retained by nuts 92. The rod 91 is also supported slidably longitudinally of the table 10 in a block 93 supported on the underside of the table 10 at its rear end. The rod 91 carries on the portion thereof projecting from block 93 a threaded sleeve 94. The masking channel 85 is forwardly tensed by a contraction spring 95, one end of which is secured to the forward end of the channel member 85 and its other end anchored to the underside of the table 10, in a forward position as at 96.

It will be readily apparent that by turning the sleeve 94, in one direction or the other, the masking channel 85 may be moved forwardly or rearwardly to move the point of contact between pawl and belt closer to or further from the impaling post, to thereby rotate the impaling post 14 through a lesser or greater angle.

An arm 97, may be connected to the channel member and extend outwardly at right angles thereto, to project from the slot 98, formed in a leg 11, for manual engagement for moving the channel member 85 the maximum distance during the formation of the initial loop, so as to turn the impaling post a full 360 so as to make a complete center loop for the bow or rosette to be formed. Thereafter, upon the release of the arm 97, the masking member will return to adjusted position so that all successive rotations of the impaling post will be at a predetermined, preset angle, to form bows with a'predetermined number of loops.

The channel member 85 may be provided with a pointer 99, that likewise extends through a slot formed in the near wall 11 of the apparatus, and also through a slot 100, formed in a casing 101, that may be fitted around the entire apparatus. One marginal edgeportion of the slot may have a gauge 102, extending along one edge thereof, for aiding in the setting of the preadjusted angle for rotation of the impaling post 14.

The impaling post of the present invention may be constituted in a manner to permit the ready and easy replacement of any of the impaling pins 15 in the event that such pin become unfit for use, as by being bent or twisted out of shape or dulled. For that purpose, the portion of the core 77 projecting above table 10 may have a relatively thick sleeve 103, fitted over its lower portion, said sleeve having an upper portion 104, of reduced thickness, that terminates short of the upper end of the core 77, and such end of the core 77 may have a longitudinally-extending threaded recess 105, formed therein, opening into its top end. A cylindrical plug 106,

of substantially the same diameter as the core 77 and provided with a reduced threaded end 107, is engageable by such threaded end within the recess 105. The plug 106 is provided with spaced longitudinal passages or openings 108, extending along its periphery from around its reduced end 107 to the other end thereof, each of which is adapted to receive therethrough a pin 109, hav ing a head 110. It willreadily be clear that when the pins are inserted into the openings 108, with their heads on the inner end of the plug, around the reduced end thereof, and the plug threaded into the recess 105, the

pins will be securely held in place, withtheir impaling ends projecting above the plug. It will also be apparent that to replace a pin it will be necessary only to unscrew the plug 106, remove the spoiled pin 109, substitute an-.

other pin in its place, and screw the plug back into place; I

for staples supplied from a stapler 114, mounted on the table in position to supply staples to such top surface. The stapler may operate a retracting mechanism that retracts the core 77 downwardly to move the impaling pins inwardly to the sleeve 111 and withdraw them from the bow loops to permit their replacement by a staple which will hold the loops permanently together. As this feature of the apparatus does not constitute part of the present invention, it is not thought necessary to describe the details thereof.

If desired, plate 18, which supports the spool arm 19, may be pivotally secured at its lower end and may have its upper end optionally securable, to maintain the plate 18 in diagonal position, so as to support the arm 19 in diagonal position extending upwardly from the apparatus, and to maintain the plate in upright position, so that the arm 19 may be horizontally disposed and moved inwardly, for compactness when out of use or during transport. To that end, the wall 16 may be provided with a pair of suitably spaced and positioned openings 115 (FIG. 3 of the drawings), selectively engageable by the threaded and knobhed pin 116, passing through the upper end of plate 18.

This completes the description of the ribbon bow or rosette-forming apparatus of the invention. It will be readily apparent that such apparatus, while of relatively simple construction, economical to produce and simple and easy to operate, is capable of producing ribbon bows or rosettes having a completely filled center and of substantially numerous variations in the number and size of the loops. It will also be apparent that the apparatus of the invention may be readily, simply and conveniently adjusted to effect such variations in number and size of loops. .It will likewise be apparent that the apparatus of the present invention is of relatively light weight and compact, and easy and convenient to store and to carry. It-will be additionally apparent that, while the apparatus of the invention has been shown as being manually operable, it is capable of being readily converted for mechanical operation.

It will be further apparent that numerous modifications and variations may be made in the ribbon bow-forming apparatus of the invention, by anyone skilled in the art, in accordance with the principles of the invention hereinabove set forth, without the exercise of any'inventive ingenuity. I desire, therefore, to be protected for any and all such variations and modifications that may be made within the spirit of the invention and scope of the claims hereto appended.

What I claim is:

1. Apparatus for forming multiple-loop ribbon bows, of the character described, comprising a table, a post having ribbon-impaling means at one end supported for unidirectional rotation on said table, a ribbon-moving carriage movably supported on said table, cooperating means on said table and said carriage for guiding said carriage for reciprocal movement toward and away from said post, a wheel mounted on said post, an idling wheel mounted on said table, means interconnecting said wheels for simultaneous rotation, means connected to said carriage engaging said wheel interconnecting means upon movement of said carriage towards said post to thereby rotate said post, and adjustable mean-s blocking said carriageconnected means from engaging said wheel interconnecting means during a variable part of the stroke of said carriage towards said post.

2. The apparatus of claim 1, wherein said means interconnecting said wheels comprises an endless strip, and

wherein said means associated with said carriage for engaging said endless strip comprises a pawl pivotally supported on said carriage for movement toward and away from said endless strip and spring tensioning means normally maintaining said pawl in strip-engaging position.

3. Theapparatus of claim 2, wherein said wheel-connecting means comprises an endless belt and said pawl comprises a disc eccentrically pivoted adjacent said belt with said larger portion of said disc directed towards said impaling post, and spring means are provided normally urging said larger portion of said disc against said belt,

4. The apparatus of claim 1, wherein theblocking means comprises a masking plate slidably supported on said table and movable for an adjustable distance between said wheel connecting means and said wheel connecting means engaging means to mask a variable portion of said wheel-connecting means against engagement by said connecting means engaging means.

5. The apparatus of claim 1, wherein said blocking means comprises a masking plate slidably supported on said table intermediate said wheel-connecting means and said connecting means engaging means, and wherein said masking plate is resiliently tensioned for masking a maxi mum portion of said connecting means from said connecting means engaging means, and manual means are provided on said masking plate for adjustably moving the same to interpose it along lesser distances between said connecting means and said connecting means engaging means.

6. The apparatus of claim 1, wherein said blocking means comprises a masking plate slidably supported on said table and movable for an adjustable distance to mask a variable portion of said wheel-connecting means against engagement by said connecting means engaging means, and means are connected to said masking plate for variably adjusting the position thereof.

. 7. The apparatus of claim 1, including ribbon-guide means connected to said carriage, said ribbon-guide means comprising a first plate hingedly connected by one end to said carriage on the side thereof facing said impaling post, and a second plate hingedly connected by one longitudinal edge to a longitudinal edge of said first plate, and means between the longitudinal edges of said plates spacing said plates from one another and defining a ribbon guideway between them.

8. The apparatus of claim 7, wherein means are provided on said plates for releasably interlocking said plates in juxtaposed position.

9. The apparatus of claim 1, wherein said impaling post includes a cylindrical core rotatably supported on said table and projecting above and belowsaid table, the portion of the core projecting above said table having an axially-extending threaded recess formed in the end portionthereof, and a plug of a diameter corresponding to the diameter of said projecting portion of said core, said plug having a threaded reduced end engageable in said recess and a plurality of axially-extending, pin-receiving passageways formed in said plug, said passageways having their openings disposed around said reduced threaded portion.

10. The apparatus of claim 1, wherein said carriage includes a ribbon-supporting surface and means are provided on said carriage engaging ,a ribbon supported on said surface to inhibit the sliding movement of said ribbon on said surface on the movement of the carriage toward said impaling post.

11. The apparatus of claim 10, wherein said means engaging said ribbon comprises a roller eccentrically axially pivotally supported on said carriage transversely of said ribbon with the heavier portion of said roller extending in the direction of said post.

References Cited by the Examiner UNITED. STATES PATENTS JORDAN FRANKLIN, Primary Examiner.

G. V. LARKIN, Assistant Examiner. 

1. APPARATUS FOR FORMING MULTIPLE-LOOP RIBBON BOWS, OF THE CHARACTER DESCRIBED, COMPRISING A TABLE, A POST HAVING RIBBON-IMPALING MEANS AT ONE END SUPPORTED FOR UNIDIRECTIONAL ROTATION ON SAID TABLE, A RIBBON-MOVING CARRIAGE MOVABLY SUPPORTED ON SAID TABLE, COOPERATING MEANS ON SAID TABLE AND SAID CARRIAGE FOR GUIDING SAID CARRIAGE FOR RECIPROCAL MOVEMENT TOWARD AND AWAY FROM SAID POST, A WHEEL MOUNTED ON SAID POST, AN IDLING WHEEL MOUNTED ON SAID TABLE, MEANS INTERCONNECTING SAID WHEELS FOR SIMULTANEOUS ROTATION, MEANS CONNECTED TO SAID CARRIAGE ENGAGING SAID WHEEL INTERCONNECTING MEANS UPON MOVEMENT OF SAID CARRIAGE TOWARDS SAIDPOST TO THEREBY ROTATE SAID POST, AND ADJUSTABLE MEANS BLOCKING SAID CARRAIGECONNECTED MEANS FOR ENGAGING SAID WHEEL INTERCONNECTING MEANS DURING A VARIABLE PART OF THE STROKE OF SAID CARRIAGE TOWARDS SAID POST. 